jsf源代码分析之FactoryFinder的问题（在线等）

step2用到的方法
 private static String getImplNameFromServices(ClassLoader classLoader,
  String factoryName) {        // Check for a services definition
        String result = null;
        BufferedReader reader = null;
        String resourceName = "META-INF/services/" + factoryName;
        Properties props = null;
        InputStream stream = null;
        try {
            stream = classLoader.getResourceAsStream(resourceName);
            if (stream != null) {
                // Deal with systems whose native encoding is possibly
                // different from the way that the services entry was created
                try {
                    reader =
                        new BufferedReader(new InputStreamReader(stream,
                                                                 "UTF-8"));
                } catch (UnsupportedEncodingException e) {
                    reader = new BufferedReader(new InputStreamReader(stream));
                }
                result = reader.readLine();
                reader.close();
                reader = null;
                stream = null;
            }
        } catch (IOException e) {
        } catch (SecurityException e) {
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (Throwable t) {
                    ;
                }
                reader = null;
                stream = null;
            }
            if (stream != null) {
                try {
                    stream.close();
                } catch (Throwable t) {
                    ;
                }
                stream = null;
            }
        }
return result;
    }
我找了很久String resourceName = "META-INF/services/" + factoryName;找不到，这个我觉得应该是通过子类来实例化工厂。